Magnesium Isotope Fractionation During Arid Pedogenesis on the Island of Hawaii (USA)

Trostle, Kyle; Derry, Louis A.; Vigier, Nathalie; Chadwick, Oliver A.

doi:10.1016/j.proeps.2014.08.031

Cited by 11 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nwankwoala et al (2014) attributed the Ca concentration to dissolution of feldspars and micas while (Kim et al, 2014) attributed Ca to precipitation of carbonate minerals during silicate dissolution. Similarly, the mean Potassium (K) concentration in the boreholes and wells were 7.2 and 5 mg/l, respectively, and were higher than the mean of 4.9 and 0.91 mg/l obtained by Ishaku et al (2011) and Trostle et al (2014)], respectively. The high correlation between Ni (R 2 = 0.92) and Zn (R 2 = 0.89) suggests similar source of origin which could be from the aquifer rocks and minerals.…”

Section: Physico-chemical Propertiesmentioning

confidence: 56%

“…3(a). Mg is attributed to Mg-rich carbonates in the aquifer of both the boreholes and wells such as basalts, kaolinite, and hematite according to Trostle et al (2014). Likewise, Nwankwoala et al (2014) found Mg range of 0.52-1.23 mg/l with mean values of 0.89 mg/l for boreholes in Yenagoa which was attributed to Mg dissolution from minerals such as feldspar and mica while a range of 68-173 mg/l was obtained for groundwater in Manali region of India by Antony et al (2008).…”

Section: Physico-chemical Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of groundwater quality in a rural community in North Central of Nigeria

Sojobi

2016

Environ Monit Assess

View full text Add to dashboard Cite

Evaluation of water quality of nine boreholes and three open hand-dug wells in a rural community in North Central Nigeria revealed relative abundance of cations Na > k > Ca > Mg > Zn > Pb and anions Cl(-) > PO4(2-) > SO4(2-) > NO3(-) in the boreholes and cations Ca > Na > K > Mg > Pb and anions NO3(-) > PO4(2-) > SO4(2-) > Cl(-) in the wells. The major contaminants exceeding SON and WHO permissible limits were NO3(-) , Mg, TH, pH and Mg, Pb, TH, pH and DO in the wells and boreholes, respectively. They are attributable to anthropogenic sources such as domestic waste water and poor waste disposal and natural sources such as mineral dissolution from clayey aquifer which made the acidic groundwater unsuitable for consumption unless they are appropriately treated. Correlation studies revealed existence of three major mineral groups in the aquifer Ca-Fe group, Na-Mg group, Zn-K group, as well as a minor group Pb-group, and they determine the chemical composition of the groundwater and the ionic exchange between the groundwater and mineral-bearing clayey aquifer. In order to curb microbial contamination by Enterobacter aerogenes and Escherichia coli, it is recommended that proper latrines and drainages be provided while domesticated animals should be restricted from boreholes and well. Further, treatment with water guard and pur purifier is recommended.

show abstract

Section: Physico-chemical Propertiesmentioning

confidence: 56%

Section: Physico-chemical Propertiesmentioning

confidence: 99%

Evaluation of groundwater quality in a rural community in North Central of Nigeria

Sojobi

2016

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…These isotope systems provide insight as to plant uptake (Bolou-Bi et al, 2012) and sources of dissolved solutes (Kisakurek et al, 2005;Weynell et al, 2017), as well as the importance of mineral (trans)formations (Ryu et al, 2014;Ma et al, 2015). Li and Mg isotopes are also fractionated during the formation of secondary minerals (Opfergelt et al, 2012;Henchiri et al, 2014;Trostle et al, 2014;Clergue et al, 2015;Dellinger et al, 2015;Dessert et al, 2015;Henchiri et al, 2016;Chapela Lara et al, 2017) and are thus well suited for tracing water-rock interactions in weathering systems. Here, we investigate the Li and Mg isotope composition of fluids from a small catchment in Guadeloupe (Quiock Creek) during a stormy period of one month.…”

Section: Introductionmentioning

confidence: 99%

The response of Li and Mg isotopes to rain events in a highly-weathered catchment

et al. 2019

View full text Add to dashboard Cite

Storms are responsible for up to ~50 % of total annual rainfall on tropical islands and result in rapid increases in discharge from rivers. Storm events are, however, notoriously under-sampled and their effects on weathering rates and processes are poorly constrained. To address this, we have undertaken high-frequency sampling of Quiock Creek catchment, a Critical Zone Observatory located in Guadeloupe, over a period of 21 days, encompassing several storm events. Chemical and isotopic (Li and Mg) analyses of different critical zone reservoirs (throughfall, soil pore water, groundwater and river water) were used to assess the interactions between rock, water and secondary minerals. The Li concentrations and δ 7 Li values of these different reservoirs range from 14 to 95 nmol/kg and 1.8 to 16.8‰, respectively. After several rain events, the average δ 7 Li value (13.3‰) of soil solutions from the lower part of the soil profile (> ~150 cm below the surface) was unchanged, whereas in the upper part of the profile δ 7 Li values increased by ~2-4‰ due to increased contribution from throughfall. By contrast, the δ 26 Mg value of soil waters in the upper part of the soil profile were not significantly affected by the rain events with an average value of-0.90‰. The δ 26 Mg values of the different fluid reservoirs were generally close to the value of throughfall (~-0.90‰), but higher δ 26 Mg values (up to-0.58‰) were measured in the deeper parts 2 of the soil profile, whereas groundwaters that have a long residence time had lower δ 26 Mg values (down to-1.48‰). These higher and lower values are attributed to, respectively, adsorption/desorption of light Mg isotopes on/from the surface of clay minerals. The δ Li value of the river waters was ~9.3‰, with a Li concentration of µmol/kg, but during a storm these values decreased to, respectively, 7.8‰ and 40 µmol/kg. This change in δ 7 Li is consistent with an increased contribution of Li from the soil solution. Thus, even in highly weathered catchments, changes in hydrological conditions can have a significant impact on weathering processes and therefore the composition of river waters delivered to the ocean.

show abstract

“…The high concentration of Mg re-affirms the high total hardness earlier reported. The elevated level of Mg in the study may be attributed to Mg-rich carbonates within the aquifer of both the BHs and wells including kaolinite, hematite and basalt (Trostle et al, 2014). Comparatively, levels of Mg in the study fall below the 68-173 mg/L range obtained from the groundwater in Manali, India (Antony et al, 2008).…”

Section: Water Physicochemical Parametersmentioning

confidence: 61%

Geoelectrical Imaging and Physicochemical Assessment of Waste Dumpsite: Implications on Groundwater Quality

Ademila

Ololade²

2018

EREM

View full text Add to dashboard Cite

The most unregarded cause of water pollution is the inappropriate dumping of wastes and improper treatment of solid wastes. The current research examined the impacts of a solid waste disposal site on water quality of the residential areas bounded by the site by integrating 2-D resistivity imaging, physical, chemical and bacteriological analyses of water samples from twelve hand-dug wells (HdW) and two boreholes (BH) using standard field and laboratory procedures. The results of the 2-D resistivity imaging of the subsurface along four traverses around the refuse dumpsite showed anomalously low resistivity zones, intermediate resistivity zones and high resistivity zones interpreted to be soil or sand saturated with contaminant leachate, rock materials having varying moisture content and composition and rock materials contaminated with dumpsite gases, respectively. The study observed that these contaminants have migrated to the depth of 25 m below the aquifer and over 20 m distance away from the edge of the dumpsite. Apart from nitrate, phosphate and turbidity, all the other physicochemical parameters tested were within the WHO recommended limits. However, the trace metals (Fe, Mn, Cr, Pb and Zn) and the total bacteria count were generally above the recommended limit. Consequent upon the associated health implications due to elevated levels of some of the contaminants, which were attributed mainly to leachate from the dumpsite, the study suggested adequate corrective measures and a programme enlightenment campaign to all end users.

show abstract

Magnesium Isotope Fractionation During Arid Pedogenesis on the Island of Hawaii (USA)

Cited by 11 publications

References 15 publications

Evaluation of groundwater quality in a rural community in North Central of Nigeria

Evaluation of groundwater quality in a rural community in North Central of Nigeria

The response of Li and Mg isotopes to rain events in a highly-weathered catchment

Geoelectrical Imaging and Physicochemical Assessment of Waste Dumpsite: Implications on Groundwater Quality

Contact Info

Product

Resources

About